﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Creation and initialization of the "FCK" object. This is the main
 * object that represents an editor instance.
 * (IE specific implementations)
 */

FCK.Description = "FCKeditor for Internet Explorer 5.5+" ;

FCK._GetBehaviorsStyle = function()
{
    if ( !FCK._BehaviorsStyle )
    {
        var sBasePath = FCKConfig.BasePath ;
        var sTableBehavior = '' ;
        var sStyle ;

        // The behaviors should be pointed using the BasePath to avoid security
        // errors when using a different BaseHref.
        sStyle = '<style type="text/css" _fcktemp="true">' ;

        if ( FCKConfig.ShowBorders )
            sTableBehavior = 'url(' + sBasePath + 'css/behaviors/showtableborders.htc)' ;

        // Disable resize handlers.
        sStyle += 'INPUT,TEXTAREA,SELECT,.FCK__Anchor,.FCK__PageBreak,.FCK__InputHidden' ;

        if ( FCKConfig.DisableObjectResizing )
        {
            sStyle += ',IMG' ;
            sTableBehavior += ' url(' + sBasePath + 'css/behaviors/disablehandles.htc)' ;
        }

        sStyle += ' { behavior: url(' + sBasePath + 'css/behaviors/disablehandles.htc) ; }' ;

        if ( sTableBehavior.length > 0 )
            sStyle += 'TABLE { behavior: ' + sTableBehavior + ' ; }' ;

        sStyle += '</style>' ;
        FCK._BehaviorsStyle = sStyle ;
    }

    return FCK._BehaviorsStyle ;
}

function Doc_OnMouseUp()
{
    if ( FCK.EditorWindow.event.srcElement.tagName == 'HTML' )
    {
        FCK.Focus() ;
        FCK.EditorWindow.event.cancelBubble    = true ;
        FCK.EditorWindow.event.returnValue    = false ;
    }
}

function Doc_OnPaste()
{
    var body = FCK.EditorDocument.body ;

    body.detachEvent( 'onpaste', Doc_OnPaste ) ;

    var ret = FCK.Paste( !FCKConfig.ForcePasteAsPlainText && !FCKConfig.AutoDetectPasteFromWord ) ;

    body.attachEvent( 'onpaste', Doc_OnPaste ) ;

    return ret ;
}

function Doc_OnDblClick()
{
    FCK.OnDoubleClick( FCK.EditorWindow.event.srcElement ) ;
    FCK.EditorWindow.event.cancelBubble = true ;
}

function Doc_OnSelectionChange()
{
    // Don't fire the event if no document is loaded.
    if ( !FCK.IsSelectionChangeLocked && FCK.EditorDocument )
        FCK.Events.FireEvent( "OnSelectionChange" ) ;
}

function Doc_OnDrop()
{
    if ( FCK.MouseDownFlag )
    {
        FCK.MouseDownFlag = false ;
        return ;
    }

    if ( FCKConfig.ForcePasteAsPlainText )
    {
        var evt = FCK.EditorWindow.event ;

        if ( FCK._CheckIsPastingEnabled() || FCKConfig.ShowDropDialog )
            FCK.PasteAsPlainText( evt.dataTransfer.getData( 'Text' ) ) ;

        evt.returnValue = false ;
        evt.cancelBubble = true ;
    }
}

FCK.InitializeBehaviors = function( dontReturn )
{
    // Set the focus to the editable area when clicking in the document area.
    // TODO: The cursor must be positioned at the end.
    this.EditorDocument.attachEvent( 'onmouseup', Doc_OnMouseUp ) ;

    // Intercept pasting operations
    this.EditorDocument.body.attachEvent( 'onpaste', Doc_OnPaste ) ;

    // Intercept drop operations
    this.EditorDocument.body.attachEvent( 'ondrop', Doc_OnDrop ) ;

    // Reset the context menu.
    FCK.ContextMenu._InnerContextMenu.AttachToElement( FCK.EditorDocument.body ) ;

    this.EditorDocument.attachEvent("onkeydown", FCK._KeyDownListener ) ;

    this.EditorDocument.attachEvent("ondblclick", Doc_OnDblClick ) ;

    this.EditorDocument.attachEvent("onbeforedeactivate", function(){ FCKSelection.Save() ; } ) ;

    // Catch cursor selection changes.
    this.EditorDocument.attachEvent("onselectionchange", Doc_OnSelectionChange ) ;

    FCKTools.AddEventListener( FCK.EditorDocument, 'mousedown', Doc_OnMouseDown ) ;
}

FCK.InsertHtml = function( html )
{
    html = FCKConfig.ProtectedSource.Protect( html ) ;
    html = FCK.ProtectEvents( html ) ;
    html = FCK.ProtectUrls( html ) ;
    html = FCK.ProtectTags( html ) ;

//    FCK.Focus() ;
    FCKSelection.Restore() ;
    FCK.EditorWindow.focus() ;

    FCKUndo.SaveUndoStep() ;

    // Gets the actual selection.
    var oSel = FCKSelection.GetSelection() ;

    // Deletes the actual selection contents.
    if ( oSel.type.toLowerCase() == 'control' )
        oSel.clear() ;

    // Using the following trick, any comment in the beginning of the HTML will
    // be preserved.
    html = '<span id="__fakeFCKRemove__" style="display:none;">fakeFCKRemove</span>' + html ;

    // Insert the HTML.
    oSel.createRange().pasteHTML( html ) ;

    // Remove the fake node
    FCK.EditorDocument.getElementById('__fakeFCKRemove__').removeNode( true ) ;

    FCKDocumentProcessor.Process( FCK.EditorDocument ) ;

    // For some strange reason the SaveUndoStep() call doesn't activate the undo button at the first InsertHtml() call.
    this.Events.FireEvent( "OnSelectionChange" ) ;
}

FCK.SetInnerHtml = function( html )        // IE Only
{
    var oDoc = FCK.EditorDocument ;
    // Using the following trick, any comment in the beginning of the HTML will
    // be preserved.
    oDoc.body.innerHTML = '<div id="__fakeFCKRemove__">&nbsp;</div>' + html ;
    oDoc.getElementById('__fakeFCKRemove__').removeNode( true ) ;
}

function FCK_PreloadImages()
{
    var oPreloader = new FCKImagePreloader() ;

    // Add the configured images.
    oPreloader.AddImages( FCKConfig.PreloadImages ) ;

    // Add the skin icons strip.
    oPreloader.AddImages( FCKConfig.SkinPath + 'fck_strip.gif' ) ;

    oPreloader.OnComplete = LoadToolbarSetup ;
    oPreloader.Start() ;
}

// Disable the context menu in the editor (outside the editing area).
function Document_OnContextMenu()
{
    return ( event.srcElement._FCKShowContextMenu == true ) ;
}
document.oncontextmenu = Document_OnContextMenu ;

function FCK_Cleanup()
{
    this.LinkedField = null ;
    this.EditorWindow = null ;
    this.EditorDocument = null ;
}

FCK._ExecPaste = function()
{
    // As we call ExecuteNamedCommand('Paste'), it would enter in a loop. So, let's use a semaphore.
    if ( FCK._PasteIsRunning )
        return true ;

    if ( FCKConfig.ForcePasteAsPlainText )
    {
        FCK.PasteAsPlainText() ;
        return false ;
    }

    var sHTML = FCK._CheckIsPastingEnabled( true ) ;

    if ( sHTML === false )
        FCKTools.RunFunction( FCKDialog.OpenDialog, FCKDialog, ['FCKDialog_Paste', FCKLang.Paste, 'dialog/fck_paste.html', 400, 330, 'Security'] ) ;
    else
    {
        if ( FCKConfig.AutoDetectPasteFromWord && sHTML.length > 0 )
        {
            var re = /<\w[^>]*(( class="?MsoNormal"?)|(="mso-))/gi ;
            if ( re.test( sHTML ) )
            {
                if ( confirm( FCKLang.PasteWordConfirm ) )
                {
                    FCK.PasteFromWord() ;
                    return false ;
                }
            }
        }

        // Instead of inserting the retrieved HTML, let's leave the OS work for us,
        // by calling FCK.ExecuteNamedCommand( 'Paste' ). It could give better results.

        // Enable the semaphore to avoid a loop.
        FCK._PasteIsRunning = true ;

        FCK.ExecuteNamedCommand( 'Paste' ) ;

        // Removes the semaphore.
        delete FCK._PasteIsRunning ;
    }

    // Let's always make a custom implementation (return false), otherwise
    // the new Keyboard Handler may conflict with this code, and the CTRL+V code
    // could result in a simple "V" being pasted.
    return false ;
}

FCK.PasteAsPlainText = function( forceText )
{
    if ( !FCK._CheckIsPastingEnabled() )
    {
        FCKDialog.OpenDialog( 'FCKDialog_Paste', FCKLang.PasteAsText, 'dialog/fck_paste.html', 400, 330, 'PlainText' ) ;
        return ;
    }

    // Get the data available in the clipboard in text format.
    var sText = null ;
    if ( ! forceText )
        sText = clipboardData.getData("Text") ;
    else
        sText = forceText ;

    if ( sText && sText.length > 0 )
    {
        // Replace the carriage returns with <BR>
        sText = FCKTools.HTMLEncode( sText ) ;
        sText = FCKTools.ProcessLineBreaks( window, FCKConfig, sText ) ;

        var closeTagIndex = sText.search( '</p>' ) ;
        var startTagIndex = sText.search( '<p>' ) ;

        if ( ( closeTagIndex != -1 && startTagIndex != -1 && closeTagIndex < startTagIndex )
                || ( closeTagIndex != -1 && startTagIndex == -1 ) )
        {
            var prefix = sText.substr( 0, closeTagIndex ) ;
            sText = sText.substr( closeTagIndex + 4 ) ;
            this.InsertHtml( prefix ) ;
        }

        // Insert the resulting data in the editor.
        FCKUndo.SaveLocked = true ;
        this.InsertHtml( sText ) ;
        FCKUndo.SaveLocked = false ;
    }
}

FCK._CheckIsPastingEnabled = function( returnContents )
{
    // The following seams to be the only reliable way to check is script
    // pasting operations are enabled in the security settings of IE6 and IE7.
    // It adds a little bit of overhead to the check, but so far that's the
    // only way, mainly because of IE7.

    FCK._PasteIsEnabled = false ;

    document.body.attachEvent( 'onpaste', FCK_CheckPasting_Listener ) ;

    // The execCommand in GetClipboardHTML will fire the "onpaste", only if the
    // security settings are enabled.
    var oReturn = FCK.GetClipboardHTML() ;

    document.body.detachEvent( 'onpaste', FCK_CheckPasting_Listener ) ;

    if ( FCK._PasteIsEnabled )
    {
        if ( !returnContents )
            oReturn = true ;
    }
    else
        oReturn = false ;

    delete FCK._PasteIsEnabled ;

    return oReturn ;
}

function FCK_CheckPasting_Listener()
{
    FCK._PasteIsEnabled = true ;
}

FCK.GetClipboardHTML = function()
{
    var oDiv = document.getElementById( '___FCKHiddenDiv' ) ;

    if ( !oDiv )
    {
        oDiv = document.createElement( 'DIV' ) ;
        oDiv.id = '___FCKHiddenDiv' ;

        var oDivStyle = oDiv.style ;
        oDivStyle.position        = 'absolute' ;
        oDivStyle.visibility    = oDivStyle.overflow    = 'hidden' ;
        oDivStyle.width            = oDivStyle.height        = 1 ;

        document.body.appendChild( oDiv ) ;
    }

    oDiv.innerHTML = '' ;

    var oTextRange = document.body.createTextRange() ;
    oTextRange.moveToElementText( oDiv ) ;
    oTextRange.execCommand( 'Paste' ) ;

    var sData = oDiv.innerHTML ;
    oDiv.innerHTML = '' ;

    return sData ;
}

FCK.CreateLink = function( url, noUndo )
{
    // Creates the array that will be returned. It contains one or more created links (see #220).
    var aCreatedLinks = new Array() ;

    // Remove any existing link in the selection.
    FCK.ExecuteNamedCommand( 'Unlink', null, false, !!noUndo ) ;

    if ( url.length > 0 )
    {
        // If there are several images, and you try to link each one, all the images get inside the link:
        // <img><img> -> <a><img></a><img> -> <a><img><img></a> due to the call to 'CreateLink' (bug in IE)
        if (FCKSelection.GetType() == 'Control')
        {
            // Create a link
            var oLink = this.EditorDocument.createElement( 'A' ) ;
            oLink.href = url ;

            // Get the selected object
            var oControl = FCKSelection.GetSelectedElement() ;
            // Put the link just before the object
            oControl.parentNode.insertBefore(oLink, oControl) ;
            // Move the object inside the link
            oControl.parentNode.removeChild( oControl ) ;
            oLink.appendChild( oControl ) ;

            return [ oLink ] ;
        }

        // Generate a temporary name for the link.
        var sTempUrl = 'javascript:void(0);/*' + ( new Date().getTime() ) + '*/' ;

        // Use the internal "CreateLink" command to create the link.
        FCK.ExecuteNamedCommand( 'CreateLink', sTempUrl, false, !!noUndo ) ;

        // Look for the just create link.
        var oLinks = this.EditorDocument.links ;

        for ( i = 0 ; i < oLinks.length ; i++ )
        {
            var oLink = oLinks[i] ;

            // Check it this a newly created link.
            // getAttribute must be used. oLink.url may cause problems with IE7 (#555).
            if ( oLink.getAttribute( 'href', 2 ) == sTempUrl )
            {
                var sInnerHtml = oLink.innerHTML ;    // Save the innerHTML (IE changes it if it is like an URL).
                oLink.href = url ;
                oLink.innerHTML = sInnerHtml ;        // Restore the innerHTML.

                // If the last child is a <br> move it outside the link or it
                // will be too easy to select this link again #388.
                var oLastChild = oLink.lastChild ;
                if ( oLastChild && oLastChild.nodeName == 'BR' )
                {
                    // Move the BR after the link.
                    FCKDomTools.InsertAfterNode( oLink, oLink.removeChild( oLastChild ) ) ;
                }

                aCreatedLinks.push( oLink ) ;
            }
        }
    }

    return aCreatedLinks ;
}

function _FCK_RemoveDisabledAtt()
{
    this.removeAttribute( 'disabled' ) ;
}

function Doc_OnMouseDown( evt )
{
    var e = evt.srcElement ;

    // Radio buttons and checkboxes should not be allowed to be triggered in IE
    // in editable mode. Otherwise the whole browser window may be locked by
    // the buttons. (#1782)
    if ( e.nodeName.IEquals( 'input' ) && e.type.IEquals( ['radio', 'checkbox'] ) && !e.disabled )
    {
        e.disabled = true ;
        FCKTools.SetTimeout( _FCK_RemoveDisabledAtt, 1, e ) ;
    }
}
